Transparent mounting corner



June 6, 1933. A. w. ENGEL 1,913,110

TRANSPARENT MOUNT ING CORNER Filed Nov. '7, 1952 .[zvz/ezz for.

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f atented June 6, 1933 UNITED STATES ALBERT w. nivenn, or cHIcAGo, iLLmoIs TRANSPARENTMOUNTING CORNER Application filed November The purpose of this invention is to provide an improved mounting device in the form of a pocket for securing photographs,

pictures, cards and the like to any suitable mount in aconvenient, artistic manner, with the corners of the card or picture inserted in the pockets which constitute the invention, and with said pockets adhesively affixed to the mount. Another object is to provide a mounting pocket of this character which shall be transparent, and therefore substantially invisible, so that it shall not obscure any portion of the picture which it overlies. A further object is to adapt a pocket of this character for securing the of the transparent material in the form of a v strip from which the proper shape is cut in several ste s in manufacturin the mount 0 ing corner.

Figure 2 illustrates a grouping of the three elements which constitute the corner, showing them in disassembled relation.

Figure 3 is a plan View of a finished corner pocket.

Figure 4 is afragmentary view of a picture or the like as secured to a mount by means of a corner pocket embodying this invention. p

Figure 5 is a section taken as indicated at line 5-5 onFigure 4. i i t Figure 6 is a View similar to Figure 1 showing a strip of transparent material with blanks at various stages in the formation of a modified form of corner pocket.

Figure 7 is a disassembled view similar to Figure 2 showingthe three parts of the modified pocket; i

, Figure 8 is a plan view of the modified pocket.

' parent material seen at2, and a second tri- 7, 1932. Serial N0. 641,542.

Figure 9 is a disassembled view similar to Figures 2 and 7 showing amodified construction comprising two pieces instead of three, i f The desirability of using transparent terial for a pocket mounting corner is obvious; it is almost invisible in use, because the portion of the picture or any printed matter on the sheet which is secured in position thereby shows through the transparentmaterial overlapping the corner of such sheet. It is difficult, however, to provide an adhesive which can be applied directly to I available transparent material such as celluloid and cellophane, and which can be relied upon to hold such material indefinitely to a mounting sheet. Therefore, it is preferable to combine the transparent material with something more absorbent, such as paper, in constructing a corner pocket for this purpose. FigureQ shows the three elements which I employ, namely, atriangular sheet of paper, 1, preferably gummed on both sides, a formed corner pocket of thetransangular sheet of paper, also shown gummed on both sides. The member, 1, forms the bottom layer of the assembled pocket. The under flaps, 4, 4., ofthe transparent member, 2, are secured to the upper. gummed surface 3 ofsaid member, 1, and the third member, 3,

is inserted in the pocket, so that its under gummed surface is adhesivelysecured to the upper or inner surfaces of the flaps, 4:, and

to the portion of the upper surface of the member, 1, whichis exposed at the space or opening formed between the inner outlines of the flaps, 4.

A convenient method of forming the transparent member, 2, is indicated in Figure 1, which illustrates a strip, 5, of transparent material, which is passed through suitable punching and forming machinery. The first operation roduces a slot, 6,,whose mid- 7 die portion inc udes, preferably, though not necessarily, an offset angular part, 6*; in the finished corner, seen in Figure 3, this provides an angular notch whose sides are respectively parallel to the two closed edges,

7, 7, of the corner pocket. Thesecond operation cuts through the strip, 5, to form the edges, 8, 8, of the flaps, 4, and also the inner edges, 9 and 10, of said flaps which outline the opening through which the gummed members, 3 and 1, are secured together in the finished article. A. connecting outline, 11, extends at right angles to the length of the strip, 5. This leaves'the material unsevered at 12, 12, so that the stock for the corner pocket is carried'along in the strip for the next operation, which involves folding up the flaps, 4, 4, so that they stand up, preferably, about at right angles to the plane of the strip, 5. Then, with the aid of mechanism, not shown, the gummed triangle of fibrous material is moistened on one side only, and the flaps, 4, are folded down over this moistened surface to secure the triangle within the pocket. Then, by an additional operation, the triangle, 1, is applied to the outer surface of the flaps, 4, only one surface of the part, 1, being moistened for this purpose, leaving the opposite surface exposed, ready for use when the pocket is adhesively secured to a mount, 13, as seen in Figure 4.

The parts, 1 and 3, may be assembled with, and secured to, the bolted transparent part, 2, either before or after the latter is severed from the strip, 5. severance may be accomplished by means of a punch whose cross-sectional area is shown at A in Figure 1. This punch is just wide enough to remove the excess portions of the flaps, 4, which extend beyond the slot, 6, and it also cuts through the small areas, 12, by which the partially severed corner has been held in the strip up to this point."

The finished corner is shown in Figure 3,

and it will be seen that the notch formed at- 6 in the continuous triangular area of the transparent upper wall, will facilitate entering the corner of a sheet or card in the pocket. If it is desired to secure such sheet permanently in the pocket, the sheet itself may be moistened on its under surface be fore insertion, and then as it is entered in the pocket, it may be pressed against the upwardly exposed gummed surface of the part, 3, to which it will adhere. The upper surface of the card or picture will be visible clearly through the transparent material, 2, of the pocket, as seen in Figure 4.

A feature of my present structure is that the fibrous triangular members, 1 and 3, are slightly smaller than the triangular outline of the transparent member, 20, so that when the parts are assembled, the folded marginal portions, 7, 7, of the finished pocket, are outside the outlines of the opaque members, 1 and 3, and when a card or picture, as indicated at 14, in Figure 4, is inserted in such a pocket, the paper parts, 1 and 3, are completely hidden. It is almost lmpossible to have the edges at 7, 7, so

In either case,

sharply folded that they will not project slightly beyond the outlines of the picture card, 14, but with the construction justdescribed these projecting marginal portlons will be transparent and scarcely visible. This produces a very neat effect, owing to the unobtrusive character of the mounting devices.

Figure 9 indicates a slight modification from the structure just described, in which the one piece of material, 15, is substituted for the triangles, 1 and 3, being folded along its diagonal, 16, so that the two halves may be assembled against opposite surfaces of the flaps, 4, 4, of the transparent corner member. This arrangement may simplify the process of assembly, and will slightly strengthen tne construction, while giving to the finished article a somewhat neater appearance, because the folded edge, 16, will hide the edges of the two flaps, 4, 4.

In Figures, 6, 7 and 8, I have illustrated a further modification, in which the threeply lower wall of the corner is of slightly greater; area than the upper transparent wall, and thus projects beyond the hypotenuse of the upper wall to facilitate entering the corner of the card or picture which is to be mounted. F ig u re 6 shows the blank,

20, in which a slot, 21,' is first out. The slot may be straight, as shown, since the function of the notch formed at 6, in the structure previously described, is to be accomplished by the projection of the lower wall of the pocket in this present form. The next operation cuts through the outlines, 22, 23, 24 and 25, leaving the material of the pocket attached to the strip at 26. The flaps, 27, are next turned up to project from the plane of the strip, 20, and then are finally folded '1 down, as seen inv the upper portion of F igure 6. The folded transparent member may then be severed from the strip by cutting through the small areas, 26, as for example,

by means of relatively small punches, indi- 33 cated in cross-section at B, B, in Figure 6. This severance may be effected either before or after the assembly of the transparent part with the gummed paper members, 31 and 33 (see Figure 7) which correspond to the parts 1 and 3 of Figure 2. Or if the transparent member, 27, is first severed from the strip, a folded member of gummed paper, like that shown in Figure 9, may be added to form a double-ply bottom wall for the pocket with the flaps, 27, anchored between the two layers of paper.

In either case, the finished corner will have substantially the appearance of that shown in Figure 8, in which the unbroken transparent area, 28, of the corner overlies the upwardly presented gummed surface of the paper, 33, while the latter extends beyond the hypotenuse of the triangular member, 28,

to facilitate entry of a card or picture in the pocket. In this form, as in that of Figure 3, the triangular portions, 31 and 33, are preferably placed so that their margins are spaced back from the folded edges, 29, of the pocket, leaving these edges transparent, and ensuring that the mounted card or picture may wholly overlie the opaque gummed parts, 31 and 33. i

It may be understood that the fibrous or paperelements, 1 and 3, or 31 and 33, or the folded. member, 15, of the several constructions herein described, may be doublegrunmed stock, that is, paper which has been previously coated on both sides with a gum which requires moistening to make it adhesive; but double-gummed stock is not esssential, since the two opposed faces of the parts, 1 and 3, or the corresponding faces of the other structures, may have a gum or n'nicilage applied to them just prior to assembly of the parts, in which case the stock need be previously gummed only on one surface. This will provide a gummed surface within the pocket facing the transparent member which will be employed for adhesive securement of the card or picture in the pocket, and it will also provide a, gumm ed under surface for the finished pocket, by which 't maybe secured to a mount, such as 13, shown in Figure 4.

The precise method at manufacture has not been described herein, since there are several ways in which the parts may be as scmbled, either by hand or by automatic machinery, and it will therefore be understood that certain steps in the manufacture herein shown and described, are included primarily for explaining the construction of the article. While there is shown and described herein certain specific structure embodying the invention, it will be mani feet to those skilled in the art that various modifications and rearrangements of the parts may be made without departing from the spirit and the scope of the invention, and that the same is not limited to the particular formherein shown and described, except in so far as indicated by the appended claims.

I claim:

l. A mounting pocket comprising a triangular top wall of transparent material with flaps of said material folded under along two sides of the triangle, and forming a relatively large single opening between them under the said top wall, and fibrous sheet material in two layers disposed respectively at opposite sides of said flaps embracing them, said layers being adhesively connected through the opening formed by saidflaps.

2. A mounting pocket comprising a triangular top wall of transparent material with flaps of said material folded under along two sides of the triangle, and forming a relatively largeopening between them under the \StLlCl top wall, sheet material in two layers disposedrespectively at opposite sides of said flaps embracing them, and adhesively secured together through the opening formed by said flaps, saidopening having greater width as measured parallel to the third side of: the triangle and ata distance therefrom,zthanit has immediately adjacent said side, whereby the adhesively secured portions of said layers are locked in the opening against withdrawal.

3. A mounting pocket comprising a triangular top wall of transparent material with flaps of said material folded under along twosidesof the triangle-forming space between them under said top wall, and fibrous sheet material in two layers disposed respectively at opposite sides of saidflflaps embracing them, said layers being adhesively connectedthrough the space formed between said flaps, and being of triangular form with two edges of each layer spaced back from the folded edges of the trans parent material. a a

4-. A mounting pocket comprising a triangular top wall of transparent material with flaps of said material folded under along two sides of: thetriangle forming a space between." them under said top wall, and fibrous sheet material in two layers disposed respectively opposite sides of said flaps embracing them, said layers being adhesively connected through the opening formed by said flaps, and the upper layer being gummed on the surface exposed within the pocket towardthe transparen't top Wall of the same. 5 3 a 3 i 5; A mountingpocket comprising a triangular top wall of transparent material with 'fi-aps ofsaid material folded under along two sidesof the triangle, with a relatively large space between the edges of said flaps under said top wall, two layers of iibrous sheet material disposed respectively at opposite sides of said flaps embracing them, the lower layer being coated with adhesive on both surfaces, whereby it is secured to the upper layer through the space between a said flaps, and is adapted to secure the assembled pocket to a mount.

6. A mounting pocket comprising a triangular top wall of transparent material with flaps of said material folded under along two sides of the triangle, with a relatively large space between the edges of said flaps under said top wall, two layers of iibrous sheet material disposed respectively at opposite sides of said flaps embracing them, the upper layer being coated with adhesive on both surfaces, whereby it is secured to the lower layer through the space between said flaps, and is adapted to permanently secure the cornerportion of a card or picture inserted in the pocket,

7. A mounting pocket comprising a triangular top wall of transparent material with flaps of said material folded under along two sides of the triangle, and forming an opening between their edges under said top wall, and fibrous sheet material in two layers formed of one piece folded upon itself and disposed with said layers respectively at opposite sides of said flaps and embracing them, and with the folded edge disposed adjacent the third side of the triangular top wall of the pocket.

8. A mounting pocket comprising a triangular top wall of transparent material with flaps of said material folded under along two sides of the triangle, and forming an opening between their edges under said top wall, and fibrous sheet material in two layers formed of one piece folded upon itself and disposed with said layers respectively at opposite sides of said flaps and embracing them, and with the folded edge disposed opposite the angle between the folded edges of the transparent material.

9. A mounting pocket comprising a triangular top wall of transparent material with flaps of said material folded under along two sides of the triangle, and forming a relatively large opening between them under said top wall, such opening having greater Width as measured parallel to the third side of the triangle and at a distance therefrom, than it has immediately adjacent said third side, and a square of fibrous sheet material doubled by folding along a diagonal disposed with its two leaves embracing said flaps adhesively secured together through said opening with the folded edge disposed opposite the angle between the folded edges of the transparent material.

ALBERT W. ENGEL. 

